209438545016 has 16 divisors (see below), whose sum is σ = 393011700000. Its totient is φ = 104635425024.

The previous prime is 209438545003. The next prime is 209438545027. The reversal of 209438545016 is 610545834902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10470320 + ... + 10490303.

It is an arithmetic number, because the mean of its divisors is an integer number (24563231250).

Almost surely, 2^209438545016 is an apocalyptic number.

It is an amenable number.

209438545016 is a deficient number, since it is larger than the sum of its proper divisors (183573154984).

209438545016 is a wasteful number, since it uses less digits than its factorization.

209438545016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20961878 (or 20961874 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 209438545016 in words is "two hundred nine billion, four hundred thirty-eight million, five hundred forty-five thousand, sixteen".